Diamond Glossary

Gemological Institute of America. The GIA does extensive research on diamonds and provides reliable diamond certification.

The outer edge or the widest part of the diamond forming a band around the diamond. Some cutters also polish the girdle into facets for maximal reflection.

A small area of concentrated crystal structure distortion, usually associated with pinpoints.

Green diamonds: a rare natural fancy from lime to intense green color available from few manufacturers like Barninka, however radiation treated diamonds (not naturals) may also have a green color variation.